Cloth trimmer for looms



July 23, 1929. M. L.. sToNl-zl .1,721,887

CLOTH TRIMMER FOR LOOMS Filed July 28,y 192'? 3 Sheets-Sheet l Il?! l!!! m Q IV* lI l lumi u MEL /m/ l. Sra/VE July 23, V1929. M. L. sToNE CLOTH TRIMMER FOR LOOMS Filed July 28 1927 3 Sheets-Sheet 2 NQ SMN.

WITNESS 8 @Mm MMM s. n .A L W M V July 23, 1929.

M.' l.. lsroNE CLOTH TRMMER Fon Looms Filed July 28, 1927 3 Sheets-Sheet 5 lg n W/ rA/ESS v www Patentes July 2s, ieee.

rara u Y i I 1571.887

MELVIN L. SToNE, 0E PROVIDENCEEHODE istanti, Assrenon To THE ESMOND MILLS, or EsMoNn, RHODE ISLAND, A ooEroEATroir 0E MASSACHUSETTS.

CLOTH TRMMER FOR LOOMS.

Application filed July 28 tics, such as different colors, are used in predetermined grouping in the weaving operation to produce predetermined effects in the woven fabric, such looms being exemplifiedl by the conventional box looms. in weaving fabricsupon looms of this general class portions of the various filling yarns are developed in the form of loose loops along the selvedge as a result of the fact that the dierent filling yarns are periodically woven into the fabric and in the interim are not used. These filling loops are required to be cut away in order that the selvedge of the fabric may present the desired nished appearance. rlhe object of the invention is to provide a fabric trimmer of novel and simple construction whereby the fabric, as the weaving progresses7 is automatically and efficiently trimmed along the selvedge to cut away such filling loops. Other objects will appear from the description hereinafter and the features of novelty will be pointed out in the claims.

In the accompanying drawings, which illustrate an example of the invent-ion without defining its limits, Fig. 1 is a plan view of the cloth trimmer; Fig. 2 is a side elevation thereof; Fig. 3 is a corresponding elevation' showing the parts in another position; Fig. 4 is a sectional view on the line 4 4 of Fig. 1; Fig. 5 is an end view', and Fig. 6 is a section on the line 6-6 of Fig. 4.

As shown in the drawings the trimmer comprises a temple l() of any customary const-ruction including an arm 11 which supports a transversely extending bracket 12 forming an integral part of or supporting a bar 13, the free end of which is mounted in a bracket 14 detachably fixed upon the temple 10 by means of screws 15. rlhe bar 13 carries rollers 16 and 16n over which an endless belt 17 travels, said belt being provided with a plurality other end directed downwardly as indicated at 23 and fastened to a member 24 securedto the arm 11 by means of screws 25 and extending transversely across the belt 17. The member 24 is continued in the form of a downwardly extending guide 26 located in tangential proximity to a plurality of rings 27, the axes of rotation of which preferably are inclined with respect to the axes of the rollers 1G. prongs 23 and constitute the customary fabric retaining means found in looms-of the kind to which the invention relates.v A roller 29 provided with prongs 30 is rotatably mounted by means of a square shaft 29a upon a bracket 31 projecting from the bar 13 and is located in axial registry with the vone roller 16 as shown in Fig. 1; the'shaft 29a is connected to move withV the belt rolle-r 16. The device further comprises'a cutting instrumentality consisting of a stationary knife 32 fixed in proper position upon the bar 13 anda cooperating movable cutter 33 pivoted-at 34 upon said bar and preferably consisting of a double knife movable across opposite sides of the stationary knife 32. The cutter 33 is carried by a pivoted member 35 acted upon by a spring 36 in a manner to maintain the cutting knife 33 in its normal position and to return it thereto as Shown in Fig- 2. The movement of the Vknife v33, under the influence of the spring 36, is arrested by means of a stop 33a. An abutment screw 37 is adjustably'mounted upon a lever 38 which is pivoted'at 39 upon a lug 40 projecting upwardly from the'bar 13. The lever 38 carries al pivoted shoe 41 constituting a yarn guide and adapted to engage and restv upon the surface of the bar 13 to guide the filling to the belt 17 as will appear more fully hereinafter. A spring 42 Vacts upon the lever 38 to cause the screw 37 to follow the cutting movements of the knife 33.

The trimmer is particularly adapted for use in looms which are used primarily for weaving fabrics having a plurality of differently colored filling yarns woven into the same. 1n such looms the shuttles carrying the diderent filling yarns become periodically active to carry said filling through the shed to produce the desired eects, and then become inactive for a period of time until the particular filling yarns carried thereby are again required in the weaving process; these shuttles are carried upon the side of The rings are provided with pins or CIK are periodically brought into opera-tion,v

loops of filling yarn, indicated by the reference character e, are formed along the selvedge of the fabric, said loops extending from that point in the fabric (Z where the particular' shuttle temporarily become inoperative to the point in said fabric where said particular shuttle again came into operation. In the present case the filling yarn in the loopsge is caused to be looped over the prongs or pins 18 of the belt 17 as shown in Fig. 1 so that said loops are held thereby in position to be cut away as will be pointed out more clearly hereinafter. As the woven fabric d is wound upon the customary cloth roll the roller 29 will be rotated by the advancing fabric which becomes caught upon the prongs 30 and thereby causes the belt 17 to be advanced in corresponding steps, the fabric ti being meanwhile held in its predetermined path by the rings 27 and the roll 29 in the well known way. This will cause a corresponding advance of the fillings a, Z) and c which pass successively beneath the shoe 41, and of the loops e which pass be-` neath the device 2O whereby said loops are held in engagement with the upper run of the belt 17 and finally pass over the stationary knife 32 and beneath the raised knife 33.

Each time the lay 43 advances to lay the fillas said belt passes over the one roller 16. AsA

the lay moves in a return direction, the spring 36 will return the arm 35 vand cutter 33 to the position against the stop 33a as shown in Fig. 2; at the same time the stop 37 will be raised until the shoe 4l comes again into engagement with the bar 13. It will be understood that in the case of a pick and pick loom the device illustrated and described herein may be duplicated upon opposite sides of the loom so that the opposite selvedge edges of the fabric are coincidentally trimmed in the manner set forth.

The device is extremely simple in construction' and eiiicient in operation and positively cuts away the loops e and thereby trims the fabric along the selvedge edges in a reliable and uniform manner. In addition, the loops c, being held by the prongs or pins 18, are prevented from becoming entangled with or woven into the fabric d.

Various changes in the specific form shown and described may be made within the scope of the claims without departing from the spirit of my invention.

I claim:

1. A trimming device for looms comprising a device adapted to travel continuously in the same direction lengthwise of the selvedge of the woven fabric, means carried by said traveling device for retaining loops of filling yarn formed atV the selvedge in the weaving process, and a cutting device automatically operated for euttingsaid filling yarn loops close to the selvedge edge of the fabric.

2. A trimming device for looms comprising an endless belt, prongs projecting outwardly from said belt and adapted to retain loops of filling yarn formed along the selvedge of the woven fabric, and a cutting means controlled by the lay of the loom for severing said filling yarn loops along the selvedge of said fabric.

3. In a trimming device for looms, the combination of an endless belt arranged to travel in close proximity to the selvedge of the woven fabric, prongs proj ectin'gfrom said belt and arranged to retain loops of filling yarn formed along the selvedge of said fabric in the weaving process, a stationary retaining device extending over and in close proximity to the upper run of said belt, a stationary cutter, and a movable cutter controlled by the lay of the loom for cutting said loops of filling yarn along the selvedge edge of said woven fabric.

4. In a trimming device for looms, the combination of an endless belt arranged to travel in close proximity to the selvedge of the woven fabric, yprongs projecting from said belt and arranged to retain loops of filling yarn formed along the selvedge of said fabric in the weaving process, a. stationary retaining device extending over and in close proximity tothe upper run of said belt, a. stationary cutter, a movable cutter controlled by the lay of the loom for cutting said loops of filling yarn along the selvedge edge of said woven fabric, a spring for maintaining saidmovable cutter in its normal position and for returning it thereto, and an adjustably mounted Y shoe for guiding outwardly extending filling yarns to said belt.

5. In a trimmer device for looms, the combination of an endless belt arranged to travel in close proximity to the selvedge of thewoven fabric, prongs projecting from said belt and arranged to retain loops of filling yarn formed along the selvedge of said fabric in the weaving process, a stationair?.7 retaining device extending,` over and in Close proximity to the upper run of said belt, a stationary eutter, a movable cutter controlled by the lay of the loom for cutting said loops of filling yarn alongthe selvedge edge oi' said Woven fabre,a spring for maintaining said movable cutter in its normal position and vfor returning it thereto, an adjustable abutment serevv, a pivoted member carrying said screw, and a shoe carried by said member for arresting the piv- 10 otal movement thereof and for guidingout- Wardly extending fitting yarns to said belt.

In testimony whereof I have hereunto set my hand.

MELVIN L. STONE. 

